Katie Maloney and Tom Schwartz celebrated Valentine's Day with a throwback photo from nearly six years ago.

Tom Schwartz May Be In Trouble With Katie Maloney On 'Vanderpump Rules'

Just weeks after becoming engaged on an episode of Vanderpump Rules, the reality couple was forced to celebrate the holiday apart, but on Sunday, Maloney gave a shout-out to her fiance on Instagram.

"A throw back to when it all began almost 6 years ago. We were just starting to fall in love and now we are engaged! It hasn't been the smoothest ride but couldn't imagine my life with out my bub. Even though we are on opposite coasts it's still Valentine's Day! I love you and can't wait to marry you @twschwa."

'Vanderpump Rules' Katie Maloney & Tom Schwartz To Wed This Fall?! Co-Star Leaks New Details

A photo posted by Katie Maloney (@musickillskate) on Feb 14, 2016 at 8:16pm PST

Following Schwartz's Vanderpump Rules proposal, Maloney spoke to Hollywood Life, revealing her shock when Schwartz got down on one knee.

“[I] was thinking, ‘Is he kidding?’ As much as I was anticipating and hoping that it would be coming soon, I definitely backed off and stopped putting pressure on him. So when it was actually happening, it was just a surreal moment. And I was trying to stay in the moment,” she explained.

As for when they would wed, Maloney explained that she and Schwartz hadn't yet set a date, and were enjoying their engagement for the time being.

For more of Katie Maloney and Tom Schwartz, tune into Vanderpump Rules season four on Mondays at 9 p.m. on Bravo, and check out a sneak peek at tonight's new episode below.